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How to Replace the Main Gear in a Garage Door Opener

The essential pressure tools is fabricated from a white plastic that normally is the weak link inside the opener. Many matters can cause this gear to fail. Some causes of damage are:

o Garage door out of stability (Springs broke or in want of adjustment)
o Chain to tight a
o Old age
o Excessive use or excessive cycle
o Factory disorder or loss of grease at time of manufacture

Replacing the huge white tools is a low cost, short and easy do it your self repair so long as you have got a few simple hand gear and comply with the safety precautions. These gears may be bought online in a spread of degrees of components.

Before you get started out it is vital a good way to have a listing of the few simple gear wished to perform this task:
o Hammer
o Half inch wrench or adjustable wrench or pliers
o three/eight” Socket or Nut Driver
o 1/4″ Socket or Nut Driver
o five/16″ Socket or Nut Driver
o Flat Standard Screwdriver
o 5/32″ Punch or similar

~WARNING ~
To save you feasible SERIOUS INJURY or even DEATH from electrocution, ALWAYS Disconnect the strength twine from your storage door from the hole before intending with any inspection or repair.

Step #1
Make positive your storage door opener is unplugged. This step insures that no person unintentionally attempts to open or close the storage door while you are operating on it or you do now not by chance prompt the door whilst servicing it.

Step #2
Disconnect the door from the outer trolley by means of manually pulling the pink disconnect rope and manually close the garage door.

CAUTION
The Garage door MUST be inside the absolutely closed role during all maintenance and inspection.

Assuring that your storage door is closed will reassure that your door will not fall or make any movement that could motive injury or startle you. We advocate that after the door is closed that you clamp the door down the usage of a vise grip or clamp above one of the rollers to save you the door from being opened from the outdoor.

Step #three
Slacken the chain or belts anxiety with the aid of dropping the tension nut at the garage door opener trolley. Typically this is nut and can be adjusted with a ½” wrench.

Step #4
Remove the sprocket or belt pulley retainer cap. Usually this has a clip on the again if you press in it will release.

Step #five
I continually recommend marking the location of the chain or belt to the sprocket previous to getting rid of. This can easily be finished with white out, tape or any other way. This step helps guarantee that your chain or belt gets reinstalled in the ideal function and makes for quick and easy reference if wished later. Remove the chain or belt from the sprocket after which slide the inner trolley to the closed function until it engages the outer trolley. Place unfastened chain/belt at the give up of the rail closest to the sprocket. I commonly duct tape the chain to save you it from falling to the ground and getting all twisted and grimy.

Step #6
It is now time to get rid of each quit covers and the principle housing. The quit cover are every connected by three or 4 ¼” head screws that may be removed with a ¼” nut motive force or socket. Be certain to unplug the wire to the circuit board.

Step #7
Remove the keeping clip and the power tools for the boundaries. Also at this time do away with the restrict switch assembly by squeezing the perimeters just underneath the bracket through the force gears. There is no want to disconnect the wires as it’s far OK to depart this restriction meeting grasp with the aid of the wires. Do now not make any changes to the restrict meeting screws, this can insure that there’s minimum adjustment needed to the boundaries after you whole your repair and run your garage door opener.

Step #8
Now its time to eliminate the RPM sensor this can be easily done through unplugging the twine harness and cast off the RPM sensor from the securing tabs.

Step #9
Disconnect the crimson, blue and white wires from the motor. It is essential that you notice wherein these wires go. The identical coloration wires visit the equal terminals on the capacitor crimson/purple and blue/blue.

Step #10
Remove the 4 five/16″ hex head screw’s that maintain the motor assembly to the frame of the storage door opener. Be certain to put your hand below the motor before doing away with the ultimate screw to prevent the motor from falling. Slide the motor meeting off the pressure shaft and vicinity in a safe vicinity. (Not on top of the ladder for apparent motives).

Step #11
Remove the three hex head screws holding the sprocket assembly to the principle chassis the use of a 5/16″ nut driver or socket. Now it is time to decide if you want to replace the primary gear handiest or the entire sprocket or all chain pressure fashions 1984 to present.

Step #12
Skip this step if you are replacing the entire gear and sprocket or pulley assembly. If you are going to update the drive tools assist the driveshaft on a block of wood and pressure the lower roll pin/Tension pin out with a five/32″ punch. See photo instance below.